Left Ventricular Hypertrophy 1

Left ventricular hypertrophy (LVH) is commonly encountered in clinical practice. The voltage developed by depolarising cardiac muscle is proportional to the mass of muscle present, therefore, during the process of LVH, as the left ventricular muscle mass increases in bulk, greater depolarisaton voltages are produced in the thickened wall. The amplitude of the R wave in the left lateral leads becomes progressively higher while the S waves in the right sided chest leads become progressively deeper. Criteria ('voltage criteria') to diagnose LVH based on the magnitude of these ECG deflections have been developed.

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